#include<bits/stdc++.h>
using namespace std;
int main(){
    int jj = 0, mm = 0, bud;
    for (int i = 1; i <= 12; i++){
    	jj = jj + 300;
    	cin >> bud;
    	jj = jj - bud;
    	if (jj < 0){
    		cout << "-" << i;
    		return 0;
    	} else if (jj / 100 > 0){
    		mm = jj / 100 * 100;
    		jj = jj % 100;
		}
	}
	jj = jj + mm * 1.2;
	cout << jj;
	return 0;
}